NON-POSITIVE-DISPLACEMENT PUMPS

Introduced: September 1968

Classification Context

Section:: MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
Class:: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
Subclass:: NON-POSITIVE-DISPLACEMENT PUMPS

Description

Non-positive-displacement pumps that operate by converting mechanical energy into fluid motion through dynamic principles rather than trapping fixed fluid volumes. This subclass encompasses centrifugal pumps, axial-flow pumps, mixed-flow pumps, and jet pumps used for transporting liquids and elastic fluids (gases, vapors) in industrial, agricultural, and utility applications. The classification includes pump designs, components, control systems, and performance characteristics, excluding positive-displacement machines covered under F04C which operate by expanding and contracting sealed chambers.

18 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

F04D 1/00 Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
F04D 11/00 Other rotary non-positive-displacement pumps
F04D 13/00 Pumping installations or systems
F04D 15/00 Control, e.g. regulation, of pumps, pumping installations, or systems
F04D 17/00 Radial-flow pumps specially adapted for elastic fluids, e.g. centrifugal pumps; Helico-centrifugal pumps specially adapted for elastic fluids
F04D 19/00 Axial-flow pumps specially adapted for elastic fluids
F04D 21/00 Pumps specially adapted for elastic fluids involving supersonic speed of pumped fluids
F04D 23/00 Other rotary non-positive-displacement pumps specially adapted for elastic fluids
F04D 25/00 Pumping installations or systems specially adapted for elastic fluids
F04D 27/00 Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
F04D 29/00 Details, component parts, or accessories
F04D 3/00 Axial-flow pumps
F04D 31/00 Pumping liquids and elastic fluids at the same time
F04D 33/00 Non-positive-displacement pumps with other than pure rotation, e.g. of oscillating type
F04D 35/00 Pumps producing waves in liquids, i.e. wave-producers
F04D 5/00 Pumps with circumferential or transverse flow
F04D 7/00 Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
F04D 9/00 Priming; Preventing vapour lock